CN111155231A

CN111155231A - Separable piezoelectric jacquard

Info

Publication number: CN111155231A
Application number: CN202010136485.2A
Authority: CN
Inventors: 芮国林; 王毅君; 祁卫
Original assignee: Jiangsu Minglangxing New Energy Technology Development Co ltd
Current assignee: Jiangsu Minglangxing New Energy Technology Development Co ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-05-15

Abstract

The detachable piezoelectric jacquard comprises a piezoelectric ceramic element assembly, a needle plate, a driving circuit board, a fixing seat assembly and a probe assembly, wherein each piezoelectric ceramic element in the piezoelectric ceramic element assembly is provided with an insulating middle substrate and at least one piezoelectric ceramic piece, at least one side of the insulating middle substrate is attached with a conductive film, one side of the at least one piezoelectric ceramic piece is fixedly attached to the middle substrate through the conductive film, the other side of the at least one piezoelectric ceramic piece is provided with an electrode layer, and the electrode layer is electrically connected with the driving circuit board through a negative electrode assembly; the detachable piezoelectric jacquard further comprises a positive pole assembly, the positive pole assembly comprises at least one elastic conductive plug-in corresponding to the number of the piezoelectric ceramic pieces, and the at least one elastic conductive plug-in is electrically connected with the driving circuit board. The detachable piezoelectric jacquard can be separated from other elements when a driving circuit board on the detachable piezoelectric jacquard breaks down, so that the whole piezoelectric jacquard does not need to be discarded, and the cost is reduced.

Description

Separable piezoelectric jacquard

Technical Field

The invention relates to a textile technology, in particular to a piezoelectric jacquard, and particularly relates to a separable piezoelectric jacquard.

Background

One type of conventional piezoelectric jacquard is mounted on a guide bar, and a driving circuit board of the piezoelectric jacquard is mounted on the piezoelectric jacquard and supplies signals and power through an external cable. The external cable is not only not beautiful, but also occupies a large space, and the installation and the disassembly of the jacquard are inconvenient.

Chinese patent application No. 201810140458.5 filed by the applicant describes a piezoelectric jacquard mounting assembly with conductive contacts, comprising a piezoelectric jacquard, a guide bar connected with the piezoelectric jacquard, a circuit board arranged on the piezoelectric jacquard, characterized in that a plurality of conductive contacts are connected at an input point of the lower side of the circuit board, a circuit board base plate is fixed on one side of the guide bar facing the lower side of the circuit board, contact points corresponding to the plurality of conductive contacts are arranged on the circuit board base plate, the plurality of conductive contacts are electrically connected with the corresponding contact points through a plurality of corresponding holes arranged on the piezoelectric jacquard base, and the corresponding contact points are connected to an input interface at one end of the circuit board base plate.

Through adopting the piezoelectricity merchant card installation component who has electrically conductive contact in the above-mentioned application, because the circuit board bottom plate directly sets up on the sley bar, can show the space of sparingly machine structure, can no longer use prior art well external cable to provide signal input and power input moreover to more pleasing to the eye, and piezoelectricity merchant clamps and unloads very conveniently.

However, the technical solutions in the above applications still have disadvantages that the contact points of the plurality of conductive contacts and the contact points corresponding to the plurality of conductive contacts on the circuit board bottom plate cannot be precisely positioned sometimes, and are prone to be misaligned, and if the contact points are misaligned in the mounting process (for example, the voltage contact point and the signal point contact, the circuit board may be damaged), the electrical contact is poor or fails.

Chinese patent application No. 201820948018.8 provides a location installation's piezoelectricity merchant card installation component that has electrically conductive contact spare, including piezoelectricity merchant card, the sley bar of being connected with piezoelectricity merchant card, be provided with the circuit board on the piezoelectricity merchant card, be connected with a plurality of electrically conductive contact spare at the input point department of the downside of circuit board, be fixed with the circuit board bottom plate in one side of sley bar towards the downside of circuit board, be equipped with the contact point that corresponds with a plurality of electrically conductive contact spare on the circuit board bottom plate, a plurality of electrically conductive contact spare pass set up a plurality of corresponding holes on piezoelectricity merchant card cassette with the corresponding contact point electricity is connected, the corresponding contact point is connected to the input interface that is located circuit board bottom plate one end, its characterized in that still is equipped with the reference column on the lower surface of piezoelectricity merchant card cassette, be equipped with the locating hole that corresponds with the reference column, the length of the positioning column is greater than the length of the conductive contact piece extending out of the lower surface of the piezoelectric jacquard clamping seat, so that after the positioning column is inserted into the corresponding positioning hole, the plurality of conductive contact pieces are electrically connected with the corresponding contact points. By adopting the positioning device for positioning and mounting, the problems that contact points which are arranged on a plurality of conductive contact elements and a circuit board bottom plate in the Chinese patent application No. 201810140458.5 and correspond to the plurality of conductive contact elements can not be accurately positioned sometimes and are easy to be misplaced are solved, so that accurate and reliable electric connection is realized.

Chinese patent application No. 201910921383.9 discloses a separable piezoelectric jacquard component, which can be separated from other elements connected with it on the piezoelectric jacquard when the driving circuit board on the separable piezoelectric jacquard component has a fault, so that the whole piezoelectric jacquard component does not need to be discarded, and the cost is reduced. The detachable piezoelectric jacquard comprises a piezoelectric ceramic element, a needle plate for fixing the piezoelectric ceramic element, a driving circuit board and a fixed seat, it is characterized in that the separable piezoelectric jacquard further comprises a switching circuit board and a probe assembly, the switching circuit board is provided with a connector, and is electrically connected with the connector arranged on the driving circuit board through the connector, the switching circuit board is electrically connected with the piezoelectric ceramic element through a wiring, the switching circuit board and the fixed seat are respectively fixed on the needle plate, the probe assembly is fixed on the needle plate through a hole on the needle plate, which is matched with the overall dimension of the probe assembly, one end of the probe assembly is provided with a connecting wire and is electrically connected with the driving circuit board through welding or a connector assembly, the other end of the probe component is provided with a spring needle, and the spring needle is electrically connected with a circuit board bottom plate arranged on the guide bar. There is still a need in the art for a separable piezoelectric jacquard that is simple to assemble and reliable in performance.

Disclosure of Invention

In order to solve the technical problems, the invention provides a detachable piezoelectric jacquard, which can be separated from other elements connected with the piezoelectric jacquard when a driving circuit board on the detachable piezoelectric jacquard breaks down, so that the whole piezoelectric jacquard does not need to be discarded, and the cost is reduced.

The separable piezoelectric jacquard comprises a piezoelectric ceramic element assembly, a needle plate, a driving circuit board, a fixing seat assembly and a probe assembly, and is characterized in that each piezoelectric ceramic element in the piezoelectric ceramic element assembly is provided with an insulating middle substrate and at least one piezoelectric ceramic piece, at least one side of the insulating middle substrate is attached with a conductive film, one side of the at least one piezoelectric ceramic piece is fixedly attached to the insulating middle substrate through the conductive film, the other side of the at least one piezoelectric ceramic piece is provided with an electrode layer, and the electrode layer is a negative electrode and is electrically connected with the driving circuit board; the separable piezoelectric jacquard further comprises a positive electrode assembly, the positive electrode assembly comprises at least one elastic conductive plug-in corresponding to the number of the piezoelectric ceramic pieces, the at least one elastic conductive plug-in is electrically connected with the driving circuit board, the elastic conductive plug-in comprises at least two elastic conductive sheets, and the at least two elastic conductive sheets enable one end of the middle substrate with the exposed conductive film to be electrically connected with the elastic conductive plug-in when the end of the middle substrate with the exposed conductive film is inserted into a structure formed by the at least two elastic conductive sheets; the probe assembly comprises a plurality of probes, one end of each probe is electrically connected with the driving circuit board, and the other end of each probe penetrates through the corresponding insulation hole in the needle plate to be electrically connected with the circuit board base plate arranged on the guide bar.

By adopting the technical scheme, the positive electrode and the negative electrode of each piezoelectric ceramic element in the piezoelectric ceramic element assembly can be reliably electrically connected with the driving circuit board, and can also be separated from the driving circuit board through the positive electrode assembly. Therefore, when the driving circuit board or the piezoelectric ceramic element is in failure or damaged, the piezoelectric jacquard can be conveniently replaced without discarding the whole piezoelectric jacquard.

In one embodiment, the resilient conductive insert is electrically connected to the driver circuit board by soldering.

In one embodiment, the resilient conductive insert is formed from two resilient conductive sheets and includes a front opening portion, a middle attachment portion, and a rear receiving portion.

In one embodiment, the negative electrode is electrically connected to the driving circuit board through a negative electrode assembly, the negative electrode assembly includes a base plate and a clamping member, the base plate is provided with a bridge portion and clamping holes located at two sides of the bridge portion, the clamping member is provided with a horizontal portion and clamping pieces located at two sides of the horizontal portion and respectively combined with the horizontal portion, when the clamping member is installed in place, the clamping pieces penetrate through the clamping holes and respectively electrically contact with electrode layers of the piezoelectric ceramic elements, and the base plate is supported on a fixing wall of the piezoelectric ceramic elements of the needle plate.

The negative electrode assembly is the same as the negative electrode assembly in a split piezoelectric jacquard assembly disclosed in chinese patent application No. 201910921383.9, which is hereby incorporated by reference in its entirety.

Alternatively, the negative electrode is electrically connected to the driving circuit board through a negative electrode assembly, the negative electrode assembly includes a bottom, a top and a longitudinal groove for receiving the at least one piezoelectric ceramic piece, the electrode layer is electrically connected to a wall of the longitudinal groove, the top has a transverse recess, the bottom is fixed to the needle plate, and the negative electrode assembly has an electrical connection portion for electrically connecting to the negative electrode contact on the driving circuit board.

In a preferred embodiment, the bottom of the negative assembly has an increased cross-sectional dimension and a recess corresponding to the bottom is provided in the needle plate, the bottom being received and secured in the recess when in place.

In one embodiment, the fixing seat assembly comprises a fixing seat, a sliding block, a gasket and a locking screw, the fixing seat comprises a front end extension part, a fixing seat locking screw hole and two guide posts, the sliding block is provided with a sliding block locking screw hole and a sliding block guide post hole for the guide post to slide in, the sliding block guide post holes are respectively positioned at two sides of the sliding block locking screw hole, and the gasket is fixed on the needle plate and is provided with a gasket guide post hole for receiving the guide post; the front end extension part of the fixed seat is provided with a plurality of insulated probe holes which are used for one end of the probe assembly to penetrate and correspond to the probes in number; the needle plate is also provided with a depressed part corresponding to the shape of the front end extension part, when the needle plate is installed in place, the front end extension part of the fixed seat is received in the depressed part, and the plurality of probes are respectively electrically connected with the circuit board bottom plate arranged on the guide bar through a plurality of insulating probe holes in the front end extension part of the fixed seat and a plurality of insulating holes in the needle plate; the head of the locking screw abuts against the shim and the guide post is received in the shim guide post hole through the slider guide post hole.

Through the matching of the fixing base assembly and other components, not only can a plurality of probes be accurately positioned, but also the problem that the traditional fixing base is not uniform in locking force due to the fact that two locking screws are used for fixing, and therefore jacquard assembly distortion is caused can be solved, and meanwhile due to the fact that the gaskets are used, pressure of the locking screws on the needle plate is uniform. The adoption of a locking screw for assembling and disassembling can also reduce the workload.

In one embodiment, a structure for fixing the heat sink of the drive circuit board is further provided on the pin plate, and the heat sink is fixed on the pin plate by the structure.

Specifically, the heat dissipation device is a fan or a heat dissipation fin.

In one embodiment, a fixing hole of the driving circuit board is formed in the driving circuit board, a fixing column corresponding to the fixing hole is formed in the fixing seat, and when the driving circuit board is installed in place, the fixing column on the fixing seat penetrates through the fixing hole of the driving circuit board to fix the driving circuit board.

In one embodiment, the detachable piezoelectric jacquard further comprises a cover for covering at least the driving circuit board, the cover is provided with a cover fixing foot, and when the cover is installed in place, the cover fixing foot is matched with a cover fixing groove which is arranged on the needle plate and corresponds to the shape of the cover fixing foot, so that the cover is fixed on the needle plate.

The purpose of setting up the cover is in preventing dust or foreign matter from getting into drive circuit board or other component parts to improve the operating performance and the life-span of piezoelectricity merchant card. The housing can be used as a bridge to realize the electric connection between the negative electrode component and the negative electrode of the driving plate.

The driving board can be also provided with a layer of insulating heat dissipation rubber mat which is contacted with the housing to achieve the heat dissipation effect.

Drawings

FIG. 1 is an exploded perspective view of one embodiment of a detachable piezoelectric jacquard of the present invention;

FIG. 2 is a schematic structural view of a piezoelectric ceramic element according to the present invention;

FIG. 3 is a schematic diagram of a driving circuit board with the conductive elastic insert of the present invention;

FIG. 4 is a schematic perspective view of the negative electrode assembly of FIG. 1;

FIG. 5 is a schematic perspective view of a mount assembly of the present invention (the shim not shown);

FIG. 6 is a perspective view of a needle plate with a mounting structure for mounting a heat dissipation fan;

FIG. 7 is a perspective view of an assembled detachable piezoelectric jacquard of the present invention; and

figure 8 is an exploded perspective view of another embodiment of the detachable piezoelectric jacquard of the present invention.

Detailed Description

The invention will be further explained with reference to the drawings. It is to be understood that the specific embodiments of the invention that are illustrated in the accompanying drawings are for purposes of description only and are not necessarily drawn to scale. Accordingly, the drawings in the present application should not be construed as limiting the invention in any way. The scope of the invention is defined by the claims.

For purposes of clarity, not all of the components or features are labeled in some of the figures, and thus, upon reading the following description, reference should be made to all of the figures for a clear and complete understanding of the invention.

It is to be understood that directional terms, such as, but not limited to, "upper," "lower," "left," "right," "front," "rear," and the like, that may be present in the present invention are relative concepts, are used for convenience in describing the present invention, and should not be construed as limiting the scope of the present invention.

Figure 1 shows an exploded perspective view of one embodiment of the detachable piezoelectric jacquard of the present invention. As shown in fig. 1, the detachable piezoelectric jacquard 100 of the present invention includes a needle plate 10, a negative electrode assembly 20, a piezo ceramic element assembly 30, a probe assembly 40, a spacer 50, a fixing base 60, a slider 75, a driving circuit board 80, and a cover 90.

Reference is also made to fig. 2-5. Each piezoceramic element 310 in piezoceramic element assembly 30 has an insulating intermediate substrate 3101 and at least one piezoceramic sheet 3102. The piezoelectric ceramic plate 3102 may be provided on one side of the insulating intermediate substrate 3101 or on both sides of the insulating intermediate substrate 3101. At least one side of the insulating intermediate substrate 3101 is attached with a conductive film 3103, and one side of the piezoelectric ceramic plate 3102 is fixedly attached to the insulating intermediate substrate 3101 through the conductive film 3103. The other side of the piezoelectric ceramic plate has an electrode layer (i.e. the side of fig. 2 facing the reader has an electrode layer, not shown) which is electrically connected to the negative contact of the driving circuit board 80 through the negative electrode assembly 20.

The insulating intermediate substrate 3101 may be made of, for example, fiberglass.

The structure of the negative electrode assembly 20 is specifically shown in fig. 4. The negative pole assembly 20 includes a base 201, a top 203, and a longitudinal groove 2032 for receiving the at least one piezoceramic wafer. The piezoceramic wafers are in contact with the walls of the longitudinal grooves 2032. Here, "longitudinal groove" means that the extending direction of the groove coincides with the extending direction of the piezoceramic sheet 310. The top 203 has a lateral recess 2031, which recess 2031 facilitates removal of the piezoceramic wafer 310 from the longitudinal groove 2032. Here, "lateral" means perpendicular to the extending direction of the longitudinal grooves 2032 and the piezoceramic sheet 310. The cross-sectional dimension of the bottom part 201 is larger than that of other parts of the negative electrode assembly 20 and is fixed on the needle plate 10 through the corresponding groove 101 on the needle plate 10. The negative electrode assembly 20 also has an electrical connection 202 for making an electrical connection with a negative electrode contact (not shown) on the drive circuit board 80.

The detachable piezoelectric jacquard in fig. 1 further comprises a positive electrode assembly 802. The positive electrode assembly 802 includes a number of resilient conductive inserts corresponding to the number of piezoceramic wafers that are electrically connected to the drive circuit board 80, such as, but not limited to, by soldering.

As shown in fig. 3, the resilient conductive insert comprises two resilient

conductive sheets

8021, 8022. The conductive

resilient strips

8021, 8022 form a structure having a front opening portion 8025, a middle attachment portion 8024, and a rear receiving portion 8023. The front opening portion 8025 facilitates insertion of a conductive film, i.e., an exposed conductive film 3103, at the end of the intermediate substrate 3101 not covered by the piezoelectric ceramic plate 3102, the intermediate attachment portion 8024 is used for ensuring good contact between the conductive film 3103 and the elastic

conductive sheets

8021 and 8022, and the rear receiving portion 8023 is used for receiving a part of the exposed conductive film 3103.

The probe assembly 40 includes a plurality of probes, such as double-ended probes, each of which has one end electrically connected to the drive circuit board 80 and the other end electrically connected to a circuit board base (not shown) provided on the guide bar through a corresponding insulation hole 103 in the needle board 10.

The electrical connection between the probe and the driving circuit board 80 and the circuit board bottom board on the guide bar can be, but is not limited to, the one described in chinese patent application No. 201810140458.5.

The detachable piezoelectric jacquard shown in fig. 1 further comprises a fixed seat assembly, as shown in fig. 1 and 5, which comprises a fixed seat 60, a slider 75, a spacer 50 and a locking screw 70. The anchor 60 includes a forward end extension 602, an anchor lock screw hole (not shown), and two guide posts 606. The slide 75 is provided with a slide lock screw hole 750 and two slide guide post holes 756 for the guide posts to slide in. Two slider guide post holes 756 are located on either side of slider lock screw hole 750. The pad 50 is fixed to the needle board 10 and has pad guide post holes 506 that receive guide posts 606.

The front end extension 602 of the holder 60 is provided with a plurality of insulating probe holes 603 corresponding to the number of the plurality of probes through which one end of the probe passes. The needle board 10 is also provided with a recess 102 corresponding to the shape of the leading end extension 602. When mounted in place, the front end extension 602 of the holder 60 is received in the recess 102 and the plurality of probes 40 are electrically connected to the circuit board backplane provided on the guide bar through a plurality of insulating probe holes 603 in the front end extension 602 of the holder and a plurality of insulating holes 103 in the needle board 10, respectively. At this point, the head of the locking screw 70 abuts against the shim 50 and the guide post 606 is received in the shim guide post hole 506 through the slider guide post hole 756. Preferably, the fixing base 60 is further provided with a fixing base mounting hole 605, and the needle plate 10 is provided with a fixing base mounting hole 105 matched with the fixing base mounting hole 605. When mounted in place, the holder mounting holes 605 are aligned with the holder mounting holes 105, and the holders 60 are fastened to the needle board 10 by fastening screws (not shown) screwed into the holder mounting holes 605 and the holder mounting holes 105.

Through the installation mode, the fixing base assembly is matched with other parts of the needle plate, so that the probe is convenient to fix, the defect that the traditional fixing base is uneven in locking force and further distorted in jacquard assembly due to the fact that two locking screws are used for fixing can be overcome, and meanwhile due to the fact that the gasket 50 is used, the pressure of the locking screws 70 on the needle plate is even. In addition, the use of a single locking screw 70 for attachment and detachment also reduces the amount of work.

Although not shown, a spring member is preferably fitted on the guide post 606 to apply elastic pressure to the slider 75 fitted thereto.

In order to increase the strength of the front end extension 602 of the fixing base 60, a plurality of reinforcing ribs 604 are further provided on the front end extension 602.

In order to fix the driving circuit board 80, a driving circuit board fixing post 601 is further provided on the fixing base 60. The driving circuit board fixing post 601 includes an upper portion 6011 and a lower portion 6012, and a sectional size of the lower portion 6012 is larger than that of the upper portion 6011. When the driving circuit board 80 is fixed in position, the bottom surface 8031 of the front end 803 of the driving circuit board 80 abuts on the upper surface of the needle plate 10, and the rear end of the driving circuit board 80 is placed on the upper surface of the lower portion 6012 of the driving circuit board fixing post 601 by passing the upper portion 6011 of the driving circuit board fixing post 601 through the driving circuit board fixing hole 801, thereby fixing the driving circuit board 80 in position.

The assembled detachable piezoelectric jacquard 100 of the present invention is shown in fig. 7 (excluding the cover)

Preferably, the upper portion 6011 of the driving circuit board fixing post 601 is threaded (not shown), and the driving circuit board 80 is further fixed by a nut (not shown) to be fitted with the thread. Of course, riveting may also be used for further fixation.

Preferably, as shown in fig. 6, four fan fixing posts 107 are provided on the upper surface of the needle board 10. The fan is fixed to the needle board 10 by inserting the four fan fixing posts 107 into the four fan fixing holes 1107 of the fan 110. The fan 110 may be electrically connected to a fan driving power supply (not shown) provided on the driving circuit board 80. The electric fan 110 may serve as a cooling means for the driving circuit board 80 when it is operated.

The cooling device is not limited to the illustrated fan, and other cooling means, such as a heat sink, may be used. The fixing of the heat sink to the pin plate 10 is easily accomplished by those skilled in the art and will not be described herein.

Preferably, as shown in fig. 1, the detachable piezoelectric jacquard 100 of the present invention further comprises a housing 90. The cover 90 is used to cover at least the driving circuit board 80. The cover 90 has a plurality of cover fastening feet 906, such as two or four. When mounted in place, the cover retaining feet 906 engage cover retaining slots 106 provided in the needle board 10 and corresponding in shape to the cover retaining feet 906 to retain the cover 90 on the needle board 10.

The provision of the cover 90 prevents dust or foreign matter from entering the drive circuit board or other components, thereby improving the operating performance and life of the piezoelectric jacquard. The heat dissipation rubber pad is adhered to the driving plate, and the heat dissipation effect is achieved.

Figure 8 is an exploded perspective view of another embodiment of the detachable piezoelectric jacquard of the present invention. Unlike fig. 1, the detachable piezoelectric jacquard 100 'in fig. 8 employs a negative electrode assembly 20'. The negative electrode assembly 20' is the negative electrode assembly in chinese patent application No. 201910921383.9 filed by the applicant. Accordingly, the needle board 10' differs slightly from the needle board 10 in fig. 1. The needle plate 10 ' is provided with a fixing wall 101 ' for fixing the piezoelectric ceramic element assembly 30 and matching with the cathode assembly 20 '. Preferably, a cover fixing groove 106 'for fixing the cover 90 is also provided on the needle plate 10'. The other components of the detachable piezoelectric jacquard 100' are the same as those of the detachable piezoelectric jacquard 100.

Based upon the foregoing description of the preferred embodiment of the invention, it should be apparent that the invention defined by the appended claims is not limited solely to the specific details set forth in the foregoing description, as many apparent variations thereof are possible without departing from the spirit or scope thereof.

Claims

1. The detachable piezoelectric jacquard comprises a piezoelectric ceramic element assembly, a needle plate, a driving circuit board, a fixing seat assembly and a probe assembly, and is characterized in that each piezoelectric ceramic element in the piezoelectric ceramic element assembly is provided with an insulating middle substrate and at least one piezoelectric ceramic piece, at least one side of the insulating middle substrate is attached with a conductive film, one side of the at least one piezoelectric ceramic piece is fixedly attached to the insulating middle substrate through the conductive film, the other side of the at least one piezoelectric ceramic piece is provided with an electrode layer, and the electrode layer is a negative electrode and is electrically connected with the driving circuit board; the separable piezoelectric jacquard further comprises a positive electrode assembly, the positive electrode assembly comprises at least one elastic conductive plug-in corresponding to the number of the piezoelectric ceramic pieces, the at least one elastic conductive plug-in is electrically connected with the driving circuit board, the elastic conductive plug-in comprises at least two elastic conductive sheets, and the at least two elastic conductive sheets enable one end of the middle substrate with the exposed conductive film to be electrically connected with the elastic conductive plug-in when the end of the middle substrate with the exposed conductive film is inserted into a structure formed by the at least two elastic conductive sheets; the probe assembly comprises a plurality of probes, one end of each probe is electrically connected with the driving circuit board, and the other end of each probe penetrates through the corresponding insulation hole in the needle plate to be electrically connected with the circuit board base plate arranged on the guide bar.

2. The detachable piezoelectric jacquard machine according to claim 1, wherein the elastic conductive insert is electrically connected to the driving circuit board by soldering.

3. The detachable piezoelectric jacquard of claim 1 or 2, wherein said elastic conductive insert is formed of two elastic conductive sheets and comprises a front opening portion, a middle fitting portion and a rear receiving portion.

4. The detachable piezoelectric jacquard machine according to claim 1, wherein the negative electrode is electrically connected to the driving circuit board through a negative electrode assembly, the negative electrode assembly comprises a bottom portion, a top portion and a longitudinal groove for receiving the at least one piezoelectric ceramic plate, the electrode layer is electrically connected to a wall of the longitudinal groove, the top portion has a transverse recess, the bottom portion is fixed to the needle plate, and the negative electrode assembly has an electrical connection portion for electrically connecting to a negative electrode contact on the driving circuit board.

5. The detachable piezoelectric jacquard of claim 4, wherein the bottom of the negative electrode assembly has an increased cross-sectional dimension and a groove corresponding to the bottom is provided on the needle plate, the bottom being received and secured in the groove when mounted in place.

6. The detachable piezoelectric jacquard machine according to claim 1, wherein the fixing base assembly comprises a fixing base, a sliding block, a gasket and a locking screw, the fixing base comprises a front end extension part, a fixing base locking screw hole and two guide posts, the sliding block is provided with a sliding block locking screw hole and a sliding block guide post hole for the guide post to slide in, the sliding block guide post holes are respectively positioned at two sides of the sliding block locking screw hole, and the gasket is fixed on the needle plate and is provided with a gasket guide post hole for receiving the guide post; the front end extension part of the fixed seat is provided with a plurality of insulated probe holes which are used for one end of the probe assembly to penetrate and correspond to the probes in number; the needle plate is also provided with a depressed part corresponding to the shape of the front end extension part, when the needle plate is installed in place, the front end extension part of the fixed seat is received in the depressed part, and the plurality of probes are respectively electrically connected with the circuit board bottom plate arranged on the guide bar through a plurality of insulating probe holes in the front end extension part of the fixed seat and a plurality of insulating holes in the needle plate; the head of the locking screw abuts against the shim and the guide post is received in the shim guide post hole through the slider guide post hole.

7. The detachable piezoelectric jacquard machine according to claim 1, wherein a structure for fixing a heat sink of a driving circuit board is further provided on the pin plate, by which the heat sink is fixed on the pin plate, and the heat sink of the driving circuit board is a fan or a heat sink.

8. The detachable piezoelectric jacquard machine according to claim 1, wherein a driving circuit board fixing hole is provided on the driving circuit board, a fixing post corresponding to the fixing hole is provided on the fixing base, and when the fixing post is mounted in place, the fixing post on the fixing base passes through the driving circuit board fixing hole to fix the driving circuit board.

9. The detachable piezoelectric jacquard of claim 1, further comprising a cover for covering at least the driving circuit board, the cover having cover fixing legs thereon, the cover fixing legs cooperating with cover fixing grooves provided on the faller bar and corresponding to the cover fixing legs in shape to fix the cover on the faller bar when mounted in place.

10. The detachable piezoelectric jacquard machine according to claim 1, wherein the negative electrode is electrically connected to the driving circuit board through a negative electrode assembly, the negative electrode assembly comprises a base plate and a clamping member, the base plate is provided with a bridge portion and clamping holes at two sides of the bridge portion, the clamping member is provided with a horizontal portion and clamping pieces at two sides of the horizontal portion and respectively combined with the horizontal portion, when the clamping members are installed in place, the clamping pieces pass through the clamping holes and respectively electrically contact with the electrode layers of the piezoelectric ceramic elements to serve as the negative electrodes of the piezoelectric ceramic elements, and the base plate is supported on the fixed wall of the piezoelectric ceramic elements of the needle plate.